WO2017219760A1

WO2017219760A1 - Display device

Info

Publication number: WO2017219760A1
Application number: PCT/CN2017/082387
Authority: WO
Inventors: 王维; 杨亚锋; 陈小川; 谭纪风; 高健; 王灿; 马新利; 张粲; 王倩
Original assignee: 京东方科技集团股份有限公司
Priority date: 2016-06-24
Filing date: 2017-04-28
Publication date: 2017-12-28
Also published as: US10267961B2; CN105929587B; US20180217306A1; CN105929587A

Abstract

A display device (10), comprising: a display panel (20) and a grating layer (30) provided inside the display panel (20) or outside the display panel (20). The display panel (20) comprises a plurality of R pixels (24), a plurality of G pixels (25) and a plurality of B pixels (26). The grating layer (30) comprises: an R grating region (33) corresponding to the R pixels (24), a G grating region (34) corresponding to the G pixels (25), and a B grating region (35) corresponding to the B pixels (26). Along the direction from the centre of a field-of-view centre area (A) of the display device (10) to a non-field-of-view centre area (B) of the display device (10), a grating period of the R grating region (33), a grating period of the G grating region (34) and a grating period of the B grating region (35) all gradually decrease. Light emitted from a position, corresponding to the R pixels (24), of the display device (10), light emitted from a position, corresponding to the G pixels (25), of the display device (10) and light emitted from a position, corresponding to the B pixels (26), of the display device (10) are all directly emitted to the eye of a viewer (Z). The display device (10) is used for virtual display.

Description

Display device

cross reference

The present application claims priority to Chinese Patent Application Serial No. No. No. No. No. No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No No

Technical field

The present disclosure relates to the field of display technologies, and in particular, to a display device.

Background technique

The display device is a device for displaying a character, a number, a symbol, a picture, or a picture formed by at least two combinations of characters, numbers, symbols, and pictures. The display device may be a flat display device, a curved display device, a 3D display device, a near-eye display device, an AR/VR display device, or the like.

With the development of display devices, people have put forward higher and higher requirements for the presence effect of the display and the immersion of the viewer. In order to improve the on-the-spot effect of the display and the immersion of the viewer, one of the key technologies is to display the display. The propagation of light within the device is effectively controlled, for example, for one of the display devices for performing virtual display, the display device has a fixed field of view central area and a non-field of view central area, and the viewer is positioned in front of the display device During the viewing of the screen displayed by the display device, the viewer's line of sight is concentrated in the central area of the field of view. By controlling the propagation of light in the display device, the viewer sees the picture as if it were projected on the display. The virtual screen on the front of the device or behind the display device enables the viewer to see the image of the central field of the field of view and the central area of the non-field of view, so that the display device has a better presence effect and enhances the immersion of the viewer.

At present, microprisms or microlenses are usually arranged on a display device to realize control of light propagation in a display device, that is, existing display devices generally adopt a structure designed based on geometric optical principles to realize light propagation in a display device. Control, however, with the development of virtual display devices, structures designed based on the principle of geometric optics are insufficient to meet the requirements for control of the propagation of light within the display device, resulting in a display effect of the display device and a immersive sensation of the viewer. Poor, giving viewers a bad viewing experience.

Summary of the invention

It is an object of the present disclosure to provide a display device for improving a viewing experience of a viewer.

In order to achieve the above object, the present disclosure provides the following technical solutions:

A display device includes: a display panel, and a grating layer disposed inside the display panel or outside the display panel, wherein the display panel includes a plurality of R pixels, a plurality of G pixels, and a plurality of B a pixel, the grating layer comprising: an R grating region corresponding to the R pixel, and a G grating corresponding to the G pixel a region, and a B-grating region corresponding to the B pixel;

a direction along a center of a field of view of the display device pointing toward a non-field center region of the display device, a grating period of the R grating region, a grating period of the G grating region, and a B grating region The grating period is gradually reduced, the display device corresponds to the light emitted by the position of the R pixel, the light emitted by the display device corresponding to the position of the G pixel, and the display device corresponding to the B pixel The light emitted by the position is respectively along a straight line formed by the position of the R pixel and a line formed by the viewer, a position of the G pixel and a line formed by the viewer, and a position of the B pixel and a line formed by the viewer. .

The display device provided by the present disclosure controls the diffraction effect occurring when light propagates in the display device by a grating layer disposed inside the display panel or outside the display panel, thereby realizing control of light propagation in the display device. Further, control of the light emitted by the display device is realized, that is, in the present disclosure, the structure designed based on the physical optical principle is used to realize the control of the propagation of light in the display device, which is based on the geometry in the prior art. The optical principle is designed to realize the control of the propagation of light in the display device, and the structure designed based on the physical optical principle has a higher control ability for the propagation of light in the display device, thereby being better able to be in the display device. The propagation of light is controlled to improve the control effect of controlling the propagation of light in the display device, improve the presence effect of the display device and the immersion of the viewer, thereby improving the viewing experience of the viewer and bringing more realism to the viewer. Comfortable viewing experience.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the disclosure, and are intended to be a In the drawing:

1 is a view showing a positional relationship between a display device and a viewer;

Figure 2 is a plan view of the display device of Figure 1;

3 is a cross-sectional view of a display device according to an embodiment of the present disclosure;

Figure 4 is a graph showing diffraction angles of first order diffraction at different positions of the device;

FIG. 5 is a schematic structural diagram of a grating layer according to an embodiment of the present disclosure;

Figure 6 is a graph of the grating period of the grating layer of Figure 5;

FIG. 7 is a schematic structural diagram of another grating layer according to an embodiment of the present disclosure;

Figure 8 is a graph showing the grating period of the grating layer of Figure 7;

FIG. 9 is a schematic structural diagram of still another grating layer according to an embodiment of the present disclosure;

FIG. 10 is a first embodiment of a pixel arrangement of a display device according to an embodiment of the present disclosure;

FIG. 11 is a second embodiment of a pixel arrangement of a display device according to an embodiment of the present disclosure;

FIG. 12 is a third embodiment of a pixel arrangement of a display device according to an embodiment of the present disclosure;

Figure 13 is a positional relationship of a viewer, a display device, and a virtual screen;

Figure 14 is a positional relationship 2 of a viewer, a display device, and a virtual screen;

Figure 15 is a positional relationship 3 of a viewer, a display device, and a virtual screen;

Figure 16 is a graph showing the relationship between the light extraction efficiency of the 0th order diffraction and the thickness of the grating projection;

Figure 17 is a graph showing the relationship between the light extraction efficiency of the first order diffraction and the thickness of the grating projection;

Figure 18 is a graph showing the relationship between the light extraction efficiency of the 0th order diffraction and the grating duty ratio;

Figure 19 is a graph showing the relationship between the light extraction efficiency of the first order diffraction and the grating duty ratio;

Figure 20 is a schematic cross-sectional view 1 of the grating protrusion;

Figure 21 is a schematic cross-sectional view 2 of the grating protrusion;

Figure 22 is a schematic cross-sectional view 3 of the grating protrusion;

Figure 23 is a schematic cross-sectional view of the grating projections four;

Figure 24 is a schematic cross-sectional view 5 of the grating protrusion;

Figure 25 is a schematic cross-sectional view 6 of the grating projection.

detailed description

In order to further explain the display device provided by the embodiment of the present disclosure, a detailed description will be made below with reference to the accompanying drawings.

Referring to FIG. 1 to FIG. 3 , the display device 10 provided by the embodiment of the present disclosure includes: a display panel 20 , and a grating layer 30 disposed inside the display panel 20 or outside the display panel 20 , wherein the display panel 20 includes multiple The R pixel 24, the plurality of G pixels 25, and the plurality of B pixels 26, the grating layer 30 includes: an R grating region 33 corresponding to the R pixel, a G grating region 34 corresponding to the G pixel 25, and a B corresponding to the B pixel 26. The grating region 35; the direction of the non-field center region B of the display device 10 along the center of the field center area A of the display device 10, the grating period of the R grating region 33, the grating period of the G grating region 34, and the B grating region 35 The grating period is gradually reduced, the light emitted by the display device 10 corresponding to the position of the R pixel 24, the light emitted by the display device 10 corresponding to the position of the G pixel 25, and the light emitted by the display device 10 corresponding to the position of the B pixel 26 are Directly to the eyes of the viewer Z.

It should be noted that, in the above embodiment, the display device 10 may be a flat surface or a curved surface. In the embodiment of the present disclosure, the display device 10 is planar as an example.

For example, referring to FIG. 1 and FIG. 2, the display device 10 provided by the embodiment of the present disclosure has a field of view central area A and a non-field of view central area B, and the field of view central area A and the non-field of view central area B are enclosed together. The light-emitting surface of the display device 10 has a viewing area in front of the display device 10. When the viewer Z is located in the viewing area and views the screen displayed by the display device 10, the line of sight of the viewer Z is concentrated in the central area A of the field of view.

When the viewer Z is located in the viewing area in front of the display device 10, and the viewer Z views the screen displayed by the display device 10, the screen seen by the viewer Z appears to be projected on the virtual screen in front of the display device 10 or behind the display device 10. 40, viewer Z, display device 10 and virtual screen 40 constitute an optical system in which virtual screen 40 can be located at the focal plane of the optical system, for example, virtual screen 40 can be located at the back focus of the optical system At the plane, that is, the virtual screen 40 is located at the focal plane behind the display device 10, or, virtual The screen 40 can be located at the front focal plane of the optical system, ie the virtual screen 40 is located at the focal plane in front of the display device 10. Assuming that there is a point Y on the virtual screen 40, the picture at the Y point seen by the viewer Z is the picture displayed at the X point on the display device 10, the viewer Z, the Y point on the virtual screen 40, and the display device 10 The X points are located on the same straight line. At this time, the distance of XY is the defocus amount, and the screen displayed at each position of the display device 10 can be obtained by estimating according to the corresponding defocus amount, or at each position of the display device 10. The displayed picture can be obtained by recording and saving it by special equipment.

In a practical application, when the viewer Z is located in the viewing area in front of the display device 10, and the viewer Z views the screen displayed by the display device 10, the screen seen by the viewer Z may further include a depth of field image, and the depth of field image may be After being recorded by a special device and processed, it may be obtained by a display chip or a central processing unit (CPU) in the display device 10 according to an image processing algorithm. Therefore, the screen displayed by the display device 10 may be To include only a screen that can be projected on a certain virtual screen 40 in front of the display device 10, or only a screen that can be projected on a certain virtual screen 40 behind the display device 10, or include a projection device that can be projected on the display device a screen on a certain virtual screen 40 before 10, and a depth of field screen of the virtual screen 40, or a screen that can be projected on a certain virtual screen 40 behind the display device 10, and a depth of field image of the virtual screen 40, Or, including a screen that can be projected on a certain virtual screen 40 in front of the display device 10, and a depth of field image of the display device 10, or The screen includes a screen that can be projected on a certain virtual screen 40 behind the display device 10, and a depth of field screen of the display device 10, or includes a screen that can be projected on all of the virtual screens 40 that the viewer Z can see. And a depth of field picture of each virtual screen 40.

Referring to FIG. 3, the display device 10 includes a display panel 20 and a grating layer 30. The display panel 20 can be a liquid crystal display panel or an OLED (Organic Light-Emitting Diode) display panel, a PDP display panel (Plasma Display Panel, plasma). a body panel), a CRT (Cathode Ray Tube) display panel or the like, the grating layer 30 is disposed inside the display panel 20 or outside the display panel 20. For example, the display device 10 is a liquid crystal display device, and the display device 10 includes a backlight. The display panel 20 includes a first substrate 21 and a second substrate 22 disposed opposite to each other, and the grating layer 30 may be disposed between the first substrate 21 and the second substrate 22, or The grating layer 30 may be disposed on a side of the first substrate 21 facing away from the second substrate 22, or the grating layer 30 may be disposed on a side of the second substrate 22 facing away from the first substrate 21, or the grating layer 30 may be disposed at The light exit side of the backlight.

The color scheme of the display device 10 adopts an RGB (Red Red, Green Green, Blue Blue) color scheme, and the display panel 20 includes a plurality of R pixels 24, a plurality of G pixels 25, and a plurality of B pixels 26, and the grating layer 30 includes: The R raster region 33 corresponding to the R pixel, the G grating region 34 corresponding to the G pixel 25, and the B grating region 35 corresponding to the B pixel 26. The grating period of the R grating region 33, the grating period of the G grating region 34, and the grating period of the B grating region 35 are gradually decreased along the direction of the center of the central region A of the field of view toward the non-field of view region B, that is, it can be considered , along the center of the central portion A of the field of view toward the edge of the display device 10, the grating period of the R grating region 33, the grating period of the G grating region 34, and the grating period of the B grating region 35 are gradually reduced, as shown in FIG. As shown, the field center area A is located in the middle of the display device 10, and the non-field center area B surrounds the field center area A, from the center a of the field center area A to the upper edge of the display device 10 in FIG. The grating period of the region 33, the grating period of the G grating region 34, and the grating period of the B grating region 35 are gradually decreased; from the center a of the central portion A of the field of view to the lower edge of the display device 10 in Fig. 2, the R grating region 33 The grating period, the grating period of the G grating region 34, and the grating period of the B grating region 35 are gradually reduced; from the center a of the central region A of the field of view to the left edge of the display device 10 in Fig. 2, the grating of the R grating region 33 The period, the grating period of the G grating region 34, and the grating period of the B grating region 35 are gradually reduced; from the center a of the central region A of the field of view to the right edge of the display device 10 of Fig. 2, the grating period of the R grating region 33, Both the grating period of the G grating region 34 and the grating period of the B grating region 35 are gradually reduced.

The light emitted by the display device 10 corresponding to the position of the R pixel 24, the light emitted by the display device 10 corresponding to the position of the G pixel 25, and the light emitted by the display device 10 corresponding to the position of the B pixel 26 are directly directed toward the viewer, that is, The light emitted by the display device 10 corresponding to the position of the R pixel 24, the light emitted by the display device 10 corresponding to the position of the G pixel 25, and the position of the light emitted by the display device 10 corresponding to the position of the B pixel 26 are respectively viewed along the R pixel 24 and viewed. The straight line formed by the person, the position of the G pixel 25, and the line formed by the viewer, the position 26 of the B pixel, and the line formed by the viewer are emitted. For example, as shown in FIG. 1, the virtual screen 40 has a point Y, and the picture at the Y point seen by the viewer Z is the picture displayed at the X point on the display device 10, on the viewer Z, on the virtual screen 40. The Y point and the X point on the display device 10 are on the same straight line, and the light emitted at the X point on the display device 10 is directed to the viewer Z, that is, the light emitted at the X point on the display device 10 along the viewer Z, virtual A point on the screen 40 and a line on the display device 10 are emitted. When the X point on the display device 10 corresponds to the R pixel, the X point on the display device 10 emits red light, and the red light is along the line of the viewer Z, the Y point on the virtual screen 40, and the X point on the display device 10. When the X point on the display device 10 corresponds to the G pixel, the X point on the display device 10 emits green light, and the green light is along the viewer Z, the Y point on the virtual screen 40, and the X point on the display device 10. The straight line is emitted; when the X point on the display device 10 corresponds to the B pixel, the X point on the display device 10 emits blue light, and the blue light is along the viewer Z, the Y point on the virtual screen 40, and the X point on the display device 10 The straight line is emitted.

The display device 10 provided by the embodiment of the present disclosure is provided with a grating layer 30, and incident light incident on the grating layer 30 is diffracted in the grating layer 30, and k-order diffraction is obtained (k=0, ±1, ±2... The relationship between the diffraction angle θ of the k-order diffraction and the grating period P of the grating generally satisfies:

In the formula (1), θ ₀ is an incident angle of incident light incident on the grating layer 30, and λ is a wavelength of incident light incident on the grating layer 30.

According to the formula (1), when the incident angle θ ₀ incident on the grating layer 30 is constant, the diffraction angle θ of the 0-order diffraction is equal to the incident angle θ ₀ incident to the grating layer 30 for the 0-order diffraction, and the grating The grating period P has no effect on the diffraction angle of the 0th order diffraction; for the non-zero order diffraction, for example, for the first order diffraction, the second order diffraction, the third order diffraction, etc., as the grating period P increases, the non-zero order diffraction The diffraction angle θ is gradually increased. Therefore, by setting different grating periods P, the diffraction angle θ of the non-zero order diffraction can be adjusted so that the diffracted light of the non-zero order diffraction is emitted in the set direction.

Specifically, the display device 10 includes a field center area A and a non-field center area B. The field center area A is located in the middle of the display device 10, and the non-field center area B surrounds the field center area A, and the viewer Z views the display. When the screen is displayed by the device 10, the line of sight of the viewer Z is concentrated in the central area A of the field of view, and the light emitted by the central area A of the field of view and directed to the eyes of the viewer Z can be regarded as the incident light passing through the central area corresponding to the field of view. The 0th-order diffracted light obtained after the grating layer 30 of A, and the light emitted by the non-field of view central area B and directed to the eyes of the viewer Z needs to be deflected before being directed to the eyes of the viewer Z, that is, It is considered that the light emitted from the non-view center area B and directed to the eyes of the viewer Z is the non-zero-order diffracted light obtained after the incident light passes through the grating layer 30 corresponding to the non-field of view central region B, and therefore, the map can be made The grating period of the grating layer 30 corresponding to the non-field center area B in 2 is smaller than the grating period of the grating layer 30 corresponding to the central area A of the field of view, so that the incident light occurs in the grating layer 30 corresponding to the non-field center area B. Non-zero order diffraction obtained after diffraction has a suitable diffraction angle, non-zero order The emitted light is deflected toward the line of sight of the viewer Z, and the non-zero-order diffracted light is directed into the eye of the viewer Z, that is, the grating period of the grating layer 30 can be set to pass the incident light through the grating layer. The diffraction angle of the non-zero-order diffraction obtained after the region corresponding to the non-field of view central region B is adjusted so that the non-zero-order diffraction obtained after the incident light is diffracted by the grating layer 30 corresponding to the non-field of view central region B has With a suitable diffraction angle, the non-zero-order diffracted light is deflected toward the line of sight of the viewer Z, and the non-zero-order diffracted light is directed into the eyes of the viewer Z.

For example, referring to FIG. 1 , the viewer Z is located in the viewing area in front of the display device 10, and when the viewer Z views the screen displayed by the display device 10, the screen seen by the viewer Z seems to be projected behind the display device 10. On the virtual screen 40, the picture at the Y point on the virtual screen 40 seen by the viewer Z corresponds to the picture at the X point of the display device 10, assuming that the X point is located in the non-field center area B of the display device 10, if To realize that the picture at the Y point on the virtual screen 40 is seen by the viewer Z, the incident light can be adjusted at the grating layer 30 corresponding to the X point by setting the grating period P at the position of the grating layer 30 corresponding to the X point. The diffraction angle θ of the non-zero-order diffraction obtained after diffraction occurs at the position such that the non-zero-order diffracted light is emitted along the line where Z, X, and Y are located, realizing that the picture at the Y point on the virtual screen 40 is viewed by the viewer. Seen from the left eye Z.

For example, assuming that the display device 10 has a size of 60 inches and the display device 10 has a width of 132.83 cm, the field center area A is located at the center of the display device 10, and the center a of the field center area A corresponds to the center of the display device 10, and It is assumed that the left-right direction in FIG. 2 is the width direction of the display device 10, and FIG. 4 shows that the first-order diffracted light obtained by diffracting incident light at different positions of the grating layer 30 in the left-right direction in FIG. 2 is directly directed to the viewer. The relationship between the angle of the deflection of the Z and the position of the display device 10, that is, the first-order diffracted light obtained by diffracting the incident light at different positions of the grating layer 30 in the left-right direction of FIG. 2 is directly directed to the viewer Z. The relationship between the diffraction angle θ required for the eye and the position of the display device 10, for example, at a position of 20 cm between the left and right direction in FIG. 2 and the center of the display device 10, the incident light is in the R grating region 33. The diffraction angle θ of the first-order diffracted light obtained after diffraction at the position corresponding to the position should reach 20°, and the incident light is in the G grating region. The diffraction angle θ of the first-order diffraction obtained after diffraction at the position corresponding to the position of 34 is 20°, and the diffraction angle of the first-order diffraction obtained after the incident light is diffracted at the position corresponding to the position of the B grating region 35 θ should reach 20°; at a position of 40 cm from the center of the display device 10, the diffraction angle θ of the first-order diffraction obtained after the incident light is diffracted at the position corresponding to the position of the R grating region 33 should reach 35°, the diffraction angle θ of the first-order diffraction obtained by the incident light diffracted at the position corresponding to the position of the G grating region 34 should be 35°, and the incident light is diffracted at the position corresponding to the position of the B grating region 35. The diffraction angle θ of the first-order diffraction obtained later should reach 35°.

By setting the grating period at each position of the R grating region 33, the G grating region 34, and the B grating region 35 of the grating layer 30, the first-order diffraction obtained by the diffraction of the incident light at each position of the R grating region 33 is obtained. The diffraction angle θ reaches an angle which should be attained, and the diffraction angle θ of the first-order diffraction obtained by diffraction of the incident light at each position of the G grating region 34 reaches an angle to be reached, and the incident light is diffracted at each position of the B grating region 35. The obtained diffraction angle θ of the first-order diffraction reaches an angle that should be attained, so that the first-order diffracted light obtained by diffracting the incident light at each position of the R grating region 33 can be directly directed into the viewer's eye, and along the viewer. The position of Z, the position on the virtual screen 40, the line where the position of the display device 10 corresponds to the position on the virtual screen 40 is emitted, and the first-order diffracted light obtained by diffraction of the incident light at each position of the G-grating region 34 is directly emitted. A position in the viewer's eye, along the position of the viewer Z, the position on the virtual screen 40, the position corresponding to the position on the display device 10 and the virtual screen 40, the incident light is at each position of the B-grating region 35. Occur Order diffracted light obtained by direct emitted into the eye of the viewer, and the viewer along the Z position, the position of the virtual screen 40, the display position on the linear position of the virtual screen 40 corresponding to the apparatus 10 is located emitted.

It can be seen from the above that the display device 10 provided by the embodiment of the present disclosure sets the grating period at each position of the grating layer 30 by the grating layer 30 disposed inside the display panel 20 or outside the display panel 20, so as to The diffraction effect that occurs when light propagates in the display device 10 is controlled, and control of the propagation of light within the display device 10 is achieved, thereby enabling control of the light emitted by the display device 10, that is, in the embodiment of the present disclosure, Control of the propagation of light within the display device 10 is achieved using a structure designed based on physical optical principles, which achieves control of light propagation within the display device 10 as compared to prior art designs based on geometric optics principles. The structure designed based on the physical optical principle has a higher ability to control the propagation of light in the display device 10, so that the propagation of light in the display device 10 can be better controlled, and the light in the display device 10 can be improved. Propagating the control effect of the control, improving the presence effect displayed by the display device 10 and the immersion of the viewer Z, thereby improving the viewer Z's viewing Inspection, the viewer Z bring more realistic and comfortable viewing experience.

It is worth mentioning that the grating layer 30 includes: an R grating region 33 corresponding to the R pixel 24, a G grating region 34 corresponding to the G pixel 25, and a B grating region 35 corresponding to the B pixel 26, an R grating region 33, The G grating region 34 and the B grating region 35 may be disposed in the same layer, or the grating layer 30 may be divided into a first layer, a second layer and a third layer which are stacked, and the R grating region 33 may be located in the first layer, the G grating region. 34 may be located in the second layer, and the B grating region 35 may be located in the third layer, that is, the R grating region 33, the G grating region 34, and the B grating region 35 are disposed at different layers, and Comparing the R grating region 33, the G grating region 34 and the B grating region 35 with the same layer, it is possible to prevent the R grating region 33, the G grating region 34 and the B grating region 35 from interfering with each other when the grating layer 30 is formed, and the grating layer 30 is facilitated. Production.

In practical applications, depending on the function of the display device 10 and the position of the viewing zone in front of the display device 10, the positions of the field of view central area A and the non-field of view central area B of the display device 10 may vary, for example, for a certain For some display devices 10, the field center area A may be located on the left side in FIG. 2, at this time, the non-field field center area B is located on the right side in FIG. 2, or, for some display devices 10, The field center area A may be located on the right side in FIG. 2, at which time the non-view field center area B is located on the left side in FIG.

It is worth noting that the incident light incident on the grating layer 30 obtains k-order diffraction (k=0, ±1, ±2...) after being diffracted by the grating layer 30, and the light outgoing direction to a certain region of the display device 10. In the adjustment, the diffraction period in the region corresponding to the region of the grating layer 30 is usually adjusted to adjust the diffraction angle of the non-zero order diffraction obtained after the diffraction layer 30 and the region corresponding to the region, for example, The diffraction angle in the first-order diffraction, the second-order diffraction, the third-order diffraction, or the like is usually adjusted by adjusting the grating period in the region of the grating layer 30 corresponding to the region. In practical applications, the incident light incident on the grating layer 30 is obtained by diffraction of the grating layer 30 to obtain k-order diffraction (k=0, ±1, ±2...), wherein the intensity of the 0th-order diffraction is the strongest, with With the increase of |k|, the intensity of the k-order diffraction gradually decreases, and generally, the intensity of the second-order diffraction is different from the intensity of the first-order diffraction by one or more orders of magnitude, that is, the intensity of the second-order diffraction is larger than that of the first-order diffraction. Since the intensity is much smaller, the diffraction angle of the first-order diffraction can be adjusted only when the diffraction angle of the non-zero-order diffraction obtained by diffraction after the region corresponding to the region of the grating layer 30 is adjusted.

In the embodiment of the present disclosure, the diffraction angle of the first-order diffraction obtained after the incident light of the grating layer 30 is diffracted is adjusted as an example, and is obtained by diffracting the incident light passing through the grating layer 30. The intensity of the order diffraction and the first-order diffraction are adjusted as an example for explanation.

It should be noted that the display device 10 provided by the embodiment of the present disclosure may be a virtual display device, a near-eye display device, an AR/VR display device, or the like.

In the above embodiment, depending on the function of the display device 10 and the position of the viewing zone in front of the display device 10, the grating layer 30 may be arranged in various manners, and the following three exemplary settings of the grating layer 30 are exemplified below. Ways, but not limited to the three ways listed.

For the arrangement of the grating layer 30, referring to FIG. 1, FIG. 2, FIG. 3, FIG. 5 and FIG. 6, the display device 10 has a field of view central area A and a non-field of view central area B, and the field of view central area A is located on the display device. a central portion of 10, and a center a of the field center area A corresponds to the center of the display device 10, in the lateral direction of the display device 10, from the center of the display device 10 to both sides of the display device 10, the grating period of the R grating region 33 The grating period of the G grating region 34 and the grating period of the B grating region 35 are gradually reduced.

Specifically, the size of the display device 10 is 60 inches as an example. The width of the display device 10 is 132.83 cm, and the height of the display device 10 is 74.72 cm. For example, as shown in FIG. 2 and FIG. 5, FIG. 2 or The left and right directions in FIG. 5 are the width direction of the display device 10, the upper and lower directions in FIG. 2 or FIG. 5 are the height directions of the display device 10, and the viewing area of the display device 10 is located directly in front of the display device 10, and the display device 10 is Viewing area It is opposed to the center of the display device 10 in the width direction.

The lateral direction of the display device 10 can be considered to be a direction parallel to the line connecting the eyes of the viewer, and the longitudinal direction of the display device 10 can be regarded as a direction perpendicular to the line connecting the eyes of the viewer. For the display device 10, the width direction of the display device 10 Parallel to the line between the eyes of the viewer, that is, the left and right directions in FIG. 2 are the lateral direction of the display device 10, and the upper and lower directions in FIG. 2 are the longitudinal direction of the display device 10.

The distance between the viewer Z and the display device 10 may be greater than 0 m and less than 500 m. In order to obtain a better viewing angle of the viewer Z, the distance between the viewer Z and the display device 10 may preferably be 0.5 m; at this time, the viewer Z views the display. At the time of the screen displayed by the device 10, the line of sight of the viewer Z is concentrated in the middle of the display device 10 in the width direction thereof, that is, in the left and right direction in FIG. 5, the line of sight of the viewer Z is concentrated in the middle of the display device 10, at this time, The field center area A is opposite to the display device 10 in the middle direction of the width direction of the display device 10, the center a of the field center area A corresponds to the center of the display device 10, and the non-field center area B is located in the center area A of the field of view. On both sides.

A vertical line q _{A1 is} set in the center a of the central portion A of the field of view in FIG. 2, along the lateral direction of the display device 10, from the vertical line q _A1 in FIG. 2 to the left and right sides of the display device 10, and the R-grating region 33 The grating period, the grating period of the G grating region 34, and the grating period of the B grating region 35 are gradually reduced, that is, the farther from the vertical line q _A1 in the lateral direction of the display device 10, the incident light passes through the R grating region 33. The larger the diffraction angle of the first-order diffraction obtained by the subsequent diffraction, the larger the diffraction angle of the first-order diffraction obtained by the diffraction of the incident light after passing through the G-grating region 34, and the first-order diffraction obtained by the diffraction of the incident light after passing through the B-grating region 35 The larger the diffraction angle, the more the light emitted at a different position of the display device 10 in the lateral direction of the display device 10 as shown by the curve q1 in Fig. 6 needs to be deflected toward the viewer Z.

As shown in FIG. 2, FIG. 5 and FIG. 6, along the left-right direction in FIG. 5, the grating period distribution curve of the R grating region 33 can be obtained according to the q1 curve and the formula (1) in FIG. 6, as shown in FIG. As shown in q2, the region of the R grating region 33 corresponding to the vertical line q _{A1 has the} largest grating period, and the region of the R grating region 33 corresponding to both sides of the display device 10 has a small grating period, for example, the R grating region 33 and the vertical The grating period of the region corresponding to the straight line q _A1 may be greater than or equal to 50 μm, and the grating period of the region of the R grating region 33 corresponding to both sides of the display device 10 may be 0.8 μm.

Along the left and right direction in FIG. 5, the distribution curve of the grating period of the G grating region 34 can be obtained according to the q1 curve and the formula (1) in FIG. 6, as shown by the curve q3 in FIG. 6, the G grating region 34 and the vertical line. The grating period of the region corresponding to q _A1 is the largest, and the grating period of the region corresponding to the two sides of the G grating region 34 and the display device 10 is small. For example, the grating period of the region corresponding to the vertical line q _{A1 of the} G grating region 34 may be larger than Or equal to 50 μm, the grating period of the G grating region 34 corresponding to both sides of the display device 10 may be 0.7 μm.

Along the left and right direction in FIG. 5, the distribution curve of the grating period of the B grating region 35 can be obtained according to the q1 curve and the formula (1) in FIG. 6, as shown by the curve q4 in FIG. 6, the B grating region 35 and the vertical line. The grating period of the region corresponding to q _A1 is the largest, and the grating period of the region corresponding to both sides of the B grating region 35 and the display device 10 is small. For example, the grating period of the region corresponding to the vertical line q _{A1 of the} B grating region 35 may be larger than Or equal to 50 μm, the grating period of the B grating region 35 corresponding to both sides of the display device 10 may be 0.5 μm.

In the arrangement mode 1 of the grating layer 30, the red color obtained by the R pixel 24 is realized by respectively setting the grating period of the R grating region 33, the grating period of the G grating region 34, and the grating period of the B grating region 35, respectively. The light, the green light obtained by the G pixel 25, and the blue light obtained by the B pixel 26 are separately adjusted and controlled so that the red, green, and blue light emitted from the respective positions of the display device 10 are oriented in the lateral direction of the display device 10. The line of sight of the viewer Z is deflected and deflected along a line along the position of the viewer Z, the position on the virtual screen 40, and the position on the display device 10 corresponding to the position on the virtual screen 40, thereby improving the display of the display device 10. The presence effect and the immersion of the viewer Z improve the viewer Z's viewing experience and bring a more realistic and comfortable viewing experience to the viewer Z.

In the arrangement 1 of the grating layer 30, in the lateral direction of the display device 10, from the center of the display device 10 to both sides of the display device 10, the grating period of the R grating region 33, the grating period of the G grating region 34, and the B grating region The grating period of 35 is gradually reduced. Therefore, the arrangement of the grating layer 30 can adjust the light-emitting direction of the display device 10 in the lateral direction of the display device 10, thereby improving the viewing experience of the lateral viewer Z along the display device 10. .

The arrangement of the grating layer 30 is as follows. Referring to FIG. 1 , FIG. 2 , FIG. 3 , FIG. 7 and FIG. 8 , the display device 10 has a field of view central area A and a non-field of view central area B, and the field of view central area A is located on the display device. a central portion of 10, and a center a of the field center area A corresponds to the center of the display device 10, in the longitudinal direction of the display device 10, from the center of the display device 10 toward both sides of the display device 10, the grating period of the R grating region 33 The grating period of the G grating region 34 and the grating period of the B grating region 35 are gradually reduced.

Specifically, the display device 10 having a size of 60 inches is taken as an example for detailed description. The width of the display device 10 is 132.83 cm, and the height of the display device 10 is 74.72 cm. For example, as shown in FIG. 2 and FIG. 7, FIG. 2 and The left and right directions in FIG. 7 are the width direction of the display device 10, the upper and lower directions in FIGS. 2 and 7 are the height directions of the display device 10, the viewing area of the display device 10 is located directly in front of the display device 10, and the display device 10 is The viewing zone is opposite to the center of the display device 10 in the width direction.

When the viewer Z views the screen displayed by the display device 10, the distance between the viewer Z and the display device 10 may be greater than 0 m and less than 500 m. In order to obtain a better viewing angle of the viewer Z, the distance between the viewer Z and the display device 10 may be Preferably, it is 0.5 m; at this time, when the viewer Z views the screen displayed by the display device 10, the line of sight of the viewer Z is concentrated in the middle of the display device 10 in the width direction thereof, that is, in the left and right direction in FIG. 7, the viewer Z The line of sight is concentrated in the middle of the display device 10. At this time, the field center area A is opposite to the central area of the display device 10 in the width direction thereof, and the center a of the field center area A corresponds to the center of the display device 10, and the non-field of view The central area B is located on both sides of the central area A of the field of view.

A transverse line q _{A2 is} set in the center a of the field center area A in Fig. 2, along the longitudinal direction of the display device 10, from the lateral line q _A2 in Fig. 2 to the left and right sides of the display device 10, and the grating period of the R grating region 33 The grating period of the G grating region 34 and the grating period of the B grating region 35 are gradually reduced, that is, the further away from the transverse line q _A2 in the longitudinal direction of the display device 10, the incident light is diffracted after passing through the R grating region 33. The larger the diffraction angle of the obtained first-order diffraction, the larger the diffraction angle of the first-order diffraction obtained by the diffraction of the incident light after passing through the G grating region 34, and the diffraction angle of the first-order diffraction obtained by the diffraction of the incident light after passing through the B grating region 35. The larger, the light emitted at a different position in the longitudinal direction of the display device 10 and the display device 10 shown in the curve q5 in FIG. 8 needs to correspond to the angle at which the viewer Z is deflected.

As shown in FIG. 2, FIG. 7, and FIG. 8, along the left-right direction in FIG. 7, the distribution curve of the grating period of the R grating region 33 can be obtained according to the q5 curve and the formula (1) in FIG. 8, as shown in FIG. As shown in q6, the region of the R grating region 33 corresponding to the lateral line q _{A2 has the} largest grating period, and the region of the R grating region 33 corresponding to both sides of the display device 10 has a small grating period, for example, the R grating region 33 and the transverse line. The grating period of the region corresponding to q _A2 may be greater than or equal to 50 μm, and the grating period of the region of the R grating region 33 corresponding to both sides of the display device 10 may be 1.2 μm.

Along the left and right direction in FIG. 7, the distribution curve of the grating period of the G grating region 34 can be obtained according to the q5 curve and the formula (1) in FIG. 8, as shown by the curve q7 in FIG. 8, the G grating region 34 and the lateral line q. The grating period of the region corresponding to _A2 is the largest, and the grating period of the region corresponding to the two sides of the G grating region 34 and the display device 10 is small. For example, the grating period of the region corresponding to the G grating region 34 and the lateral line q _A2 may be greater than or equal to The grating period of the 50 μm, G grating region 34 corresponding to both sides of the display device 10 may be 1 μm.

Along the left and right direction in FIG. 7, the distribution curve of the grating period of the B grating region 35 can be obtained according to the q5 curve and the formula (1) in FIG. 8, as shown by a curve q8 in FIG. 8, the B grating region 35 and the lateral line q. The grating period corresponding to the region corresponding to _A2 is the largest, and the grating period of the region corresponding to the two sides of the B grating region 35 and the display device 10 is small. For example, the grating period of the region corresponding to the horizontal grating line q _{A2 of the} B grating region 35 may be greater than or equal to The grating period of the 50 μm, B grating region 35 corresponding to both sides of the display device 10 may be 0.8 μm.

In the second arrangement mode of the grating layer 30, the red color obtained by the R pixel 24 is realized by respectively setting the grating period of the R grating region 33, the grating period of the G grating region 34, and the grating period of the B grating region 35, respectively. The light, the green light obtained by the G pixel 25, and the blue light obtained by the B pixel 26 are respectively adjusted and controlled so that the red, green, and blue light emitted from the respective positions of the display device 10 are oriented in the longitudinal direction of the display device 10. The line of sight of the viewer Z is deflected and deflected along a line along the position of the viewer Z, the position on the virtual screen 40, and the position on the display device 10 corresponding to the position on the virtual screen 40, thereby improving the display of the display device 10. The presence effect and the immersion of the viewer Z improve the viewer Z's viewing experience and bring a more realistic and comfortable viewing experience to the viewer Z.

In the arrangement 2 of the grating layer 30, in the longitudinal direction of the display device 10, from the center of the display device 10 to both sides of the display device 10, the grating period of the R grating region 33, the grating period of the G grating region 34, and the B grating region The grating period of 35 is gradually reduced. Therefore, the arrangement of the grating layer 30 can realize the adjustment of the light-emitting direction of the display device 10 in the longitudinal direction of the display device 10, thereby improving the longitudinal viewer Z along the display device 10. Viewing experience.

The display device 10 provided by the arrangement of the grating layer 30 can improve the viewing experience along the lateral viewer Z of the display device 10, and the display device 10 provided in the arrangement mode 2 of the grating layer 30 can improve the longitudinal viewer along the display device 10. The viewing experience of Z, in practical applications, can also improve the viewing experience of the viewer Z along the horizontal and vertical directions of the display device 10.

The arrangement of the grating layer 30 is as follows. Referring to FIG. 1 , FIG. 2 and FIG. 9 , the display device 10 has a field of view central area A and a non-field of view central area B, and the field of view central area A is located in the central area of the display device 10 , and The center of the field of view central area A corresponds to the center of the display device 10, along the longitudinal direction of the display device 10, from the center of the display device 10 to both sides of the display device 10, the grating period of the R grating region 33, and the G grating region 34 Both the grating period and the grating period of the B grating region 35 are gradually reduced; along the lateral direction of the display device 10, from the center of the display device 10 toward both sides of the display device 10, the grating period of the R grating region 33, and the G grating region 34 Both the grating period and the grating period of the B grating region 35 are gradually reduced.

Specifically, the display device 10 having a size of 60 inches is taken as an example for detailed description. The width of the display device 10 is 132.83 cm, and the height of the display device 10 is 74.72 cm. For example, as shown in FIG. 2 and FIG. 9, FIG. 2 and The left and right directions in FIG. 9 are the width direction of the display device 10, the upper and lower directions in FIGS. 2 and 9 are the height directions of the display device 10, and the viewing area of the display device 10 is located directly in front of the display device 10, and the display device 10 is The viewing zone is opposite to the center of the display device 10 in the width direction.

When the viewer Z views the screen displayed by the display device 10, the distance between the viewer Z and the display device 10 may be greater than 0 m and less than 500 m. In order to obtain a better viewing angle of the viewer Z, the distance between the viewer Z and the display device 10 may be Preferably, it is 0.5 m; at this time, when the viewer Z views the screen displayed by the display device 10, the line of sight of the viewer Z is concentrated in the central portion of the display device 10, and the central portion A of the field of view is opposite to the central portion of the display device 10, The center area B is located around the center of the field of view A.

In the arrangement 3 of the grating layer 30, along the longitudinal direction of the display device 10, from the center of the display device 10 to both sides of the display device 10, the grating period of the R grating region 33, the grating period of the G grating region 34, and the B grating region The grating period of 35 is gradually reduced; along the lateral direction of the display device 10, from the center of the display device 10 toward both sides of the display device 10, the grating period of the R grating region 33, the grating period of the G grating region 34, and the B grating region The grating period of 35 is gradually reduced. Therefore, in the lateral direction of the display device 10, red, green, and blue light emitted from both sides of the display device 10 are respectively deflected toward the viewer's line of sight, and along the position of the viewer Z, the position on the virtual screen 40, and the display. The line on the device 10 corresponding to the position on the virtual screen 40 is deflected to improve the viewing experience along the lateral viewer Z of the display device 10; in the longitudinal direction of the display device 10, the red is emitted from both sides of the display device 10. Light, green, and blue light are deflected toward the viewer's line of sight, respectively, along the position of the viewer Z, The position on the virtual screen 40, the line on the display device 10 corresponding to the position on the virtual screen 40, is deflected to improve the viewing experience along the longitudinal viewer Z of the display device 10. That is, in the display device 10 provided in the third aspect, the grating period of the R grating region 33, the grating period of the G grating region 34, and the grating period of the B grating region 35 are respectively changed along the lateral and longitudinal directions of the display device 10, and can be simultaneously The viewing experience of the viewer Z along the lateral and vertical directions of the display device 10 is improved.

It is worth mentioning that in the arrangement mode 3 of the grating layer 30, the grating layer 30 may include a lateral grating which satisfies the lateral direction of the display device 10 and a longitudinal grating which satisfies the longitudinal direction of the display device 10, a lateral grating and a longitudinal grating. It may be arranged in the same layer, or the grating layer 30 may be divided into a transverse layer and a longitudinal layer, the transverse grating is located in the lateral layer, and the longitudinal grating is located in the longitudinal layer.

In the above embodiment, the display panel 20 includes a plurality of R pixels, a plurality of G pixels, and a plurality of B pixels, wherein the plurality of R pixels, the plurality of G pixels, and the plurality of B pixels may be arranged in multiple manners, that is, displayed. In the panel 20, the pixels can be arranged in various ways, for example:

Referring to FIG. 10, in the lateral direction of the display device 10, the display device 10 includes a plurality of R pixel columns, a plurality of G pixel columns, and a plurality of B pixel columns, an R pixel column, a G pixel column, and a B pixel. The columns are arranged in phase, the R pixel columns are formed by a plurality of R pixels 24 arranged in the longitudinal direction of the display device 10, the G pixel columns are formed by a plurality of G pixels 25 arranged in the longitudinal direction of the display device 10, and the B pixel columns are arranged along the display device 10 A plurality of B pixels 26 arranged in a longitudinal direction are formed.

Specifically, as shown in FIG. 10, the left-right direction in FIG. 10 is the lateral direction of the display device 10, and the up-and-down direction in FIG. 10 is the longitudinal direction of the display device 10, and a plurality of R pixels 24, a plurality of G pixels 25, and a plurality of B The pixels 26 are arranged in an array, that is, a plurality of R pixels 24, a plurality of G pixels 25, and a plurality of B pixels 26 constitute a pixel array, and the pixel array includes a plurality of pixel rows extending in the lateral direction of the display device 10 and along the longitudinal direction of the display device 10. a plurality of pixel columns extending, each pixel row includes a plurality of R pixels 24, a plurality of G pixels 25, and a plurality of B pixels 26, and the R pixel 24, the G pixel 25, and the B pixel 26 are arranged alternately, for example, The R pixel 24, the G pixel 25, and the B pixel 26 are sequentially arranged, or alternatively, the G pixel 25, the R pixel 24, and the B pixel 26 may be sequentially arranged, or may be the G pixel 25, the B pixel 26, and the R pixel 24 in order. Arrangement, etc., is not limited herein; each pixel column includes one of G pixel 25, B pixel 26, and R pixel 24, forming an R pixel column, a G pixel column, and a B pixel column.

When the pixels in the display panel 20 are arranged in a pixel manner, the grating layer 30 is arranged in the manner of the grating layer 30. The following manner can be adopted: Referring to FIG. 5, the grating layer 30 includes a plurality of grating protrusions 31 and gratings. The projection 31 is a strip-shaped grating projection, and the grating projection 31 extends in the longitudinal direction of the display device 10, and the plurality of grating projections 31 are arranged in parallel in the lateral direction of the display device 10. Specifically, the left-right direction in FIG. 5 is the lateral direction of the display device 10, the up-and-down direction in FIG. 5 is the longitudinal direction of the display device 10, and the grating layer 30 includes a plurality of grating protrusions 31, two adjacent two grating protrusions. There is a slit 32 between the 31, and the grating protrusion 31 includes: an R grating protrusion corresponding to the R pixel 24, a G grating protrusion corresponding to the G pixel 25, and a B grating protrusion corresponding to the B pixel 26; a grating protrusion 31 is a strip-shaped grating protrusion, and the grating protrusion 31 is along the longitudinal direction of the display device 10. The extension, that is, the R grating protrusion, the G grating protrusion, and the B grating protrusion are all strip-shaped grating protrusions, the R grating protrusions are parallel to the extending direction of the R pixel columns, the G grating protrusions and the G pixel columns The extending directions are parallel, and the B grating bumps are parallel to the extending direction of the B pixel columns.

Arrangement 2 of pixels, please continue to refer to FIG. 11. In the longitudinal direction of the display device 10, the display device 10 includes a plurality of R pixel rows, a plurality of G pixel rows, and a plurality of B pixel rows, R pixel rows, G pixel rows, and B. The pixel rows are arranged one on another, and the R pixel rows are formed by a plurality of R pixels 24 arranged in the lateral direction of the display device 10, the G pixel rows are formed by a plurality of G pixels 25 arranged in the lateral direction of the display device 10, and the B pixel rows are formed by the edge display device A plurality of B pixels 26 arranged in the lateral direction of 10 are formed.

Specifically, as shown in FIG. 11, the left-right direction in FIG. 11 is the lateral direction of the display device 10, the up-and-down direction in FIG. 11 is the longitudinal direction of the display device 10, and a plurality of R pixels 24, a plurality of G pixels 25, and a plurality of B The pixels 26 are arranged in an array, that is, a plurality of R pixels 24, a plurality of G pixels 25, and a plurality of B pixels 26 constitute a pixel array, and the pixel array includes a plurality of pixel rows extending in the lateral direction of the display device 10 and along the longitudinal direction of the display device 10. a plurality of pixel columns extending, each pixel column includes a plurality of R pixels 24, a plurality of G pixels 25, and a plurality of B pixels 26, and the R pixel 24, the G pixel 25, and the B pixel 26 are arranged alternately, for example, may be The R pixel 24, the G pixel 25, and the B pixel 26 are sequentially arranged, or alternatively, the G pixel 25, the R pixel 24, and the B pixel 26 may be sequentially arranged, or may be the G pixel 25, the B pixel 26, and the R pixel 24 in order. Arrangement, etc., is not limited herein; each pixel row includes one of G pixel 25, B pixel 26, and R pixel 24, forming an R pixel row, a G pixel row, and a B pixel row.

When the pixels in the display panel 20 are arranged in two pixels, and the grating layer 30 is disposed in the second manner, the following manner can be adopted: Referring to FIG. 7, the grating layer 30 includes a plurality of grating protrusions 31. The grating protrusions 31 are strip-shaped grating protrusions, and the grating protrusions 31 extend in the lateral direction of the display device 10, and the plurality of grating protrusions 31 are arranged in parallel in the longitudinal direction of the display device 10. Specifically, the left-right direction in FIG. 7 is the lateral direction of the display device 10, the up-and-down direction in FIG. 7 is the longitudinal direction of the display device 10, and the grating layer 30 includes a plurality of grating protrusions 31, two adjacent two grating protrusions. There is a slit 32 between the 31, and the grating protrusion 31 includes: an R grating protrusion corresponding to the R pixel 24, a G grating protrusion corresponding to the G pixel 25, and a B grating protrusion corresponding to the B pixel 26; a grating protrusion 31 is a strip-shaped grating protrusion, and the grating protrusion 31 extends along the lateral direction of the display device 10, that is, the R grating protrusion, the G grating protrusion, and the B grating protrusion are strip-shaped grating protrusions, and the R grating The protrusions are parallel to the extending direction of the R pixel columns, the G grating protrusions are parallel to the extending direction of the G pixel columns, and the B grating protrusions are parallel to the extending direction of the B pixel columns.

The arrangement of the pixels is three. Referring to FIG. 12, along the lateral direction of the display device 10, the R pixel 24, the G pixel 25 and the B pixel 26 are arranged in phase; along the longitudinal direction of the display device 10, the R pixel 24, the G pixel 25 and the B pixel 26 Arranged in phase.

Specifically, as shown in FIG. 12, the left-right direction in FIG. 12 is the lateral direction of the display device 10, and the up-and-down direction in FIG. 12 is the longitudinal direction of the display device 10, and a plurality of R pixels 24, a plurality of G pixels 25, and a plurality of B The pixels 26 are arranged in an array, that is, the plurality of R pixels 24, the plurality of G pixels 25, and the plurality of B pixels 26 constitute a pixel array, and the pixels The array includes a plurality of pixel rows extending in a lateral direction of the display device 10 and a plurality of pixel columns extending in a longitudinal direction of the display device 10, each pixel row including a plurality of R pixels 24, a plurality of G pixels 25, and a plurality of B pixels 26 And the R pixel 24, the G pixel 25, and the B pixel 26 are arranged alternately, for example, the R pixel 24, the G pixel 25, and the B pixel 26 may be sequentially arranged, or may be the G pixel 25, the R pixel 24, and the B pixel. 26 is arranged in order, or may be G pixel 25, B pixel 26 and R pixel 24 arranged in order, and so on, which is not limited herein; each pixel column includes a plurality of R pixels 24, a plurality of G pixels 25 and more B pixels 26, and R pixels 24, G pixels 25 and B pixels 26 are arranged in phase, for example, R pixels 24, G pixels 25 and B pixels 26 may be arranged in order, or may be G pixels 25, R pixels The 24 and the B pixels 26 are arranged in order, or the G pixels 25, the B pixels 26, and the R pixels 24 may be sequentially arranged, and the like, which is not limited herein.

In the above embodiment, when the viewer Z is located in the viewing area in front of the display device 10 and views the screen displayed by the display device 10, the screen viewed by the viewer Z is like the virtual screen 40 projected behind the display device 10. The positional relationship of the viewer Z, the display device 10, and the virtual screen 40 may be various, for example:

The positional relationship between the viewer Z, the display device 10 and the virtual screen 40. Referring to FIG. 13, the viewer Z views the screen displayed by the display device 10, and the screen is projected on the virtual screen 40 behind the display device 10, and the virtual screen 40 is The curved virtual screen has a center of the virtual screen 40 and the viewer Z is located at the center of the virtual screen 40.

The positional relationship 2 between the viewer Z, the display device 10 and the virtual screen 40. Referring to FIG. 14, the viewer Z views the screen displayed by the display device 10, and the screen is projected on the virtual screen 40 behind the display device 10, and the virtual screen 40 is The curved virtual screen has a center of the virtual screen 40, and the viewer Z is located on the side of the center of the virtual screen 40 facing the virtual screen 40.

The positional relationship 3 between the viewer Z, the display device 10 and the virtual screen 40. Referring to FIG. 15, the viewer Z views the screen displayed by the display device 10, and the screen is projected on the virtual screen 40 behind the display device 10, and the virtual screen 40 is The curved virtual screen has a center of the virtual screen 40, and the display device 10 is located on the side of the center of the virtual screen 40 away from the virtual screen 40.

It should be noted that the positional relationship of the viewer Z, the display device 10, and the virtual screen 40, the viewer Z, the positional relationship of the display device 10 and the virtual screen 40, and the viewer Z, the display device 10, and the virtual screen 40 are illustrated. In the positional relationship three, when the distance between the viewer Z and the display device 10 is constant, for the display device 10 of the same size, when the positions of the central portion A of the field of view are the same, the grating period at each position of the display device 10 can be Use the same settings.

It is worth mentioning that, in practical applications, in the above embodiment, the setting manner of the grating layer 30, the arrangement of the pixels, and the positional relationship of the viewer Z, the display device 10, and the virtual screen 40 may be arbitrarily combined, for example, The arrangement manner of the grating layer 30, the arrangement of the pixels 1 and the positional relationship of the viewer Z, the display device 10 and the virtual screen 40, or the arrangement mode of the grating layer 30 and the arrangement of the pixels may be adopted. Secondly, the combination of the viewer Z, the positional relationship of the display device 10 and the virtual screen 40, or the arrangement of the raster layer 30, the arrangement of the pixels 2, and the viewer Z, The combination of the positional relationship 2 of the display device 10 and the virtual screen 40, and the like, to adapt to different application requirements of the display device 10, to achieve different display of the display device 10, for example, virtual surface display, spherical virtual display, etc. .

In the above embodiment, by setting the grating period of each region of the grating layer 30, the grating period of the R grating region 33 is gradually decreased in the direction of the center of the central portion A of the field of view toward the non-field center region B, so that The grating period of the G grating region 34 gradually decreases along the direction of the center of the central region A of the field of view toward the non-field of view region B, so that the grating period of the B grating region 35 points to the center of the non-field of view along the center of the central region A of the field of view. The direction of B is gradually reduced so that the red, green, and blue light emitted from the respective positions of the display device 10 are deflected toward the line of sight of the viewer Z, thereby causing the light emitted from each position of the display device 10 to be oriented. The line of sight of the viewer Z is deflected and deflected along a line along the position of the viewer Z, the position on the virtual screen 40, and the position on the display device 10 corresponding to the position on the virtual screen 40, thereby improving the display of the display device 10. The presence effect and the immersion of the viewer Z improve the viewer Z's viewing experience and bring a more realistic and comfortable viewing experience to the viewer Z.

When actually applied, generally, the light emitted by the field center area A of the display device 10 can be considered to be directed into the eyes of the viewer Z, that is, from the field center area A of the display device 10, directly to the viewer Z. The light in the eye can be regarded as the 0th-order diffracted light after the incident light is diffracted in the region corresponding to the central region A of the grating layer 30, and the light emitted from the non-field center region B of the display device 10 needs to be biased. After being folded, it is incident into the eye of the viewer Z, that is, light emitted from the non-field center area B of the display device 10 and directed into the eye of the viewer Z can be regarded as incident light at the grating layer 30 and the non-field of view center. The diffracted non-zero-order diffracted light is generated in the region corresponding to the region B. Thus, the intensity of light emitted by the field center area A of the display device 10 and directed into the eyes of the viewer Z may be higher than that emitted by the non-field center area B of the display device 10 directly toward the viewer Z. The intensity of light inside. In order to further improve the presence effect of the display device 10 and the immersion of the viewer Z, improve the viewing experience of the viewer Z, and bring a more realistic and comfortable viewing experience to the viewer Z, it is necessary to increase the non-field of view by the display device 10. The intensity of the light emitted from the central zone B directly into the eye of the viewer Z, that is, the intensity and incidence of the 0th-order diffraction after the incident light is diffracted in the region corresponding to the grating layer 30 and the central region A of the field of view The intensity of the non-zero-order diffracted light that has been diffracted in the region corresponding to the grating layer 30 and the non-field of view central region B is adjusted to be emitted from the field center A of the display device 10 and directed to the viewer Z. The intensity of the light in the eye matches the intensity of the light emitted by the non-field center region B of the display device 10 and directed into the eye of the viewer Z.

The display device 10 provided by the embodiment of the present disclosure is provided with a grating layer 30, and incident light incident on the grating layer 30 is diffracted and interfered at the grating layer 30, and k-order diffraction obtained after the incident light is diffracted at the grating layer 30 The phenomenon of interference constructive or interference cancellation occurs, and the k-order diffraction obtained after the incident light is diffracted at the grating layer 30 may cause the interference constructive length or the interference cancellation is related to the thickness of the grating bump 31 of the grating layer 30, Therefore, the thickness of the grating protrusions 31 of the grating layer 30 can be set such that the interference of a certain order of diffraction occurs or the interference is cancelled, and the intensity of the k-order diffraction is adjusted, and the adjustment is made at each position of the display device 10, The intensity of the light directed into the eyes of the viewer Z causes the light emitted at each position of the display device 10 to be directed into the eyes of the viewer Z. The combination of the amount of light and the intensity further improves the viewing experience of the viewer Z, giving the viewer Z a more realistic and comfortable viewing experience.

Generally, when the grating period of the grating layer 30 and the grating duty ratio are constant, the refractive index of the grating protrusion 31 of the grating layer 30 is n _G , and the filling in the gap 32 between the adjacent two grating protrusions 31 The refractive index is n _S , the incident light incident on the grating layer 30 has a wavelength λ, and when the thickness h of the grating layer 30 is

When m is a half integer, the 0th order diffraction obtained after the incident light is diffracted by the grating layer 30 is interference canceled, and the 1st order diffraction obtained by the incident light after being irradiated by the grating layer 30 is interfered by the phase length, when the grating layer 30 is Thickness h is

When m is an integer, the 0th-order diffraction obtained by the incident light after being diffracted by the grating layer 30 interferes with the phase length, and the first-order diffraction obtained by the incident light after being diffracted by the grating layer 30 is interference-cancelled.

For example, referring to FIG. 16 and FIG. 17, when the grating period of the grating layer 30 is 3 μm, the grating duty ratio of the grating layer 30 is 0.5, and the incident light incident on the grating layer 30 is 0 grade obtained after diffraction of the grating layer 30. The relationship between the light-emitting efficiency of the diffraction and the thickness of the grating protrusion 31 of the grating layer 30 is shown in FIG. 16. The light-emitting efficiency of the first-order diffraction obtained by the incident light incident on the grating layer 30 after being diffracted by the grating layer 30 and the grating layer The relationship between the thicknesses of the grating projections 31 of 30 is as shown in Fig. 17. As is apparent from Fig. 16 and Fig. 17, when m is an integer, for example, when m is taken as 1, the 0th order diffraction is long, and the 1st order diffraction is interfered. Destructive, when m takes a half integer, such as m

When the 0th order diffraction occurs, the interference cancels, and the 1st order diffraction interferes with the constructive length.

That is, the intensity of light emitted from the respective positions of the display device 10 and directed into the eyes of the viewer Z is related to the thickness of the grating protrusions 31 of the grating layer 30, and according to the above conclusion, each of the grating layers 30 can be passed. The thickness of the grating bumps 31 of the region is set to adjust the intensity of the 0th-order diffraction and the non-zero-order diffraction at each position of the display device 10, thereby adjusting the position of the display device 10 to be emitted directly to the viewer Z. The intensity of the light in the eye, for example, causes the non-zero-order diffraction obtained by the incident light to be diffracted in the region corresponding to the non-field center region B of the grating layer 30 to interfere constructively, so that the incident light is in the grating layer 30 and The 0-order diffraction obtained by diffraction in the region corresponding to the central region B of the field of view undergoes interference cancellation, and the intensity of light emitted from the respective positions of the display device 10 and directed to the eyes of the viewer Z is matched.

In the embodiment of the present disclosure, the 0-order diffraction and the first-order diffraction obtained after the incident light is diffracted in the grating layer 30 are respectively controlled as an example. For the viewer Z, the field of view center of the display device 10 is used. The light emitted by the area A can be considered to be directly incident into the eyes of the viewer Z, and the light emitted by the non-field center area B of the display device 10 needs to be deflected to be directly directed into the eyes of the viewer Z. In the central region A of the field of view of the display device 10, the 0-order diffraction obtained after the incident light is diffracted by the grating layer 30 is mainly controlled, and in the non-field center region B of the display device 10, the incident is mainly incident. The light is controlled by the first order diffraction obtained after the diffraction of the grating layer 30.

Specifically, in general, it can be assumed that incident light incident on the grating layer 30 is incident perpendicular to the grating layer 30, that is, incident light incident on the grating layer 30 is collimated incident, and incident angle θ ₀ of incident light incident on the grating layer 30 is incident. When the display device 10 is a liquid crystal display device, the display device 10 includes a display panel 20 and a backlight. The backlight provides a surface light source for the display panel 20. When the surface light source is incident into the display panel 20, it is generally perpendicular to When the display panel 20 is incident and the grating layer 30 is disposed inside or outside the display panel 20, the surface light source is also incident perpendicular to the grating layer 30.

The grating layer 30 includes a plurality of grating projections 31, wherein the thickness h _B of the grating projections 31 in the region corresponding to the non-field of view central region _B satisfies:

Where n _GB is the refractive index of the grating protrusion 31 located in the area corresponding to the non-field of view central area B, and n _SB is the adjacent two grating protrusions located in the area corresponding to the non-field of view central area B The refractive index of the filler in the gap 32 between 31, λ is the wavelength of the incident light incident on the grating layer 30, m _B is the second constant, and the second constant m _B satisfies:

j=0, 1, 2, 3, 4...

When the thickness h _B of the grating projection 31 located in the region corresponding to the non-field center region B satisfies the formula (2), the incident light is obtained after being diffracted in the region corresponding to the grating layer 30 and the non-field center region B. The first-order diffraction has an interference construct length, which increases the intensity of the first-order diffraction obtained by the incident light in the R grating region 33 in the region corresponding to the non-field of view central region B, and increases the incident light in the non-view. The intensity of the first-order diffraction obtained after the G-grating region 34 in the region corresponding to the central region B of the field is diffracted, and the incident light is obtained by diffracting the B-grating region 35 in the region corresponding to the non-field-of-view central region B. The intensity of the first-order diffraction increases the intensity of the first-order diffraction obtained after the incident light is diffracted in the region corresponding to the grating layer 30 and the non-field of view central region B, so that it is emitted from each position of the display device 10, and is directed to the direct direction. The intensity of the light in the eyes of the viewer Z is matched, the brightness difference of the picture viewed by the viewer Z is reduced, the brightness uniformity of the picture viewed by the viewer Z is improved, and the viewing experience of the viewer Z is further improved. Bring viewers Z more realistic and comfortable Appropriate viewing experience.

The thickness h _A of the grating projection 31 located in the region corresponding to the central region A of the field of view satisfies:

Wherein n _GA is a refractive index of the grating protrusion 31 located in a region corresponding to the central area A of the field of view, and n _SA is an adjacent two grating protrusions 31 located in a region corresponding to the central area A of the field of view The refractive index of the filler in the gap 32, λ is the wavelength of the incident light incident on the grating layer 30, m _A is the first constant, and the first constant m _A satisfies:

i=1, 2, 3, 4...

In formula (3), the first constant m _A satisfies:

i=1, 2, 3, 4..., that is, the first constant m _A does not take a half integer, and at this time, the incident light is obtained in the region where the grating layer 30 is diffracted in the region corresponding to the central region A of the field of view. The diffraction is interference-destructive, and the 0-order diffraction obtained by the incident light after being diffracted in the region corresponding to the central region A of the grating layer 30 does not interfere with interference, that is, is located corresponding to the central region A of the field of view. When the thickness h _B of the grating protrusion 31 in the region satisfies the formula (2), the intensity of the 0th-order diffracted light obtained by the incident light after being diffracted in the R grating region 33 corresponding to the central portion A of the field of view can be adjusted. The intensity of the 0th-order diffracted light obtained after the incident light is diffracted in the G grating region 34 corresponding to the central region A of the field of view is adjusted, and the incident light is adjusted to be diffracted in the B grating region 35 corresponding to the central region A of the field of view. The intensity of the 0-order diffracted light obtained is adjusted to adjust the intensity of light emitted from the field center area A of the display device 10 to the eyes of the viewer Z, improving the brightness uniformity of the picture viewed by the viewer Z, In turn, the viewing experience of the viewer Z is improved, and the viewer Z is brought more realistic and comfortable. See experience.

In the foregoing embodiment, the value of the first constant m _A may be an integer or a non-integer. The first constant m _A may be determined according to actual requirements. For example, the incident light corresponds to the central portion of the field of view in the grating layer 30. When the intensity of the 0th-order diffraction obtained after diffraction in the region of A is different from the intensity of the first-order diffraction obtained after the incident light is diffracted in the region of the grating layer 30 corresponding to the non-field of view central region B, the first constant m _A may take an integer, and the incident light is interfered by the 0-order diffraction obtained after the diffraction of the grating layer 30 in the region corresponding to the central region A of the field of view. At this time, the incident light corresponds to the central region A of the field of view in the grating layer 30. The intensity of the 0th-order diffracted light obtained after diffraction in the region is maximized, or the first constant m _A may take a non-integer, and the value of the first constant m _A is close to an integer, for example, when i is taken as 1, And when 0.5<m _A <1, the value of the first constant m _A may be 0.85, 0.9 or 0.95, etc.; when i is 1, and 1<m _A <1.5, the value of the first constant m _A may be It is 1.05, 1.1 or 1.15.

The intensity of the 0th order diffraction obtained after the incident light is diffracted in the region of the grating layer 30 corresponding to the central region A of the field of view and the incident light are diffracted in the region of the grating layer 30 corresponding to the non-field of view central region B. When the intensity of the order diffraction is large, the first constant m _A may not take an integer, and the value of the first constant m _A is preferably close to a half integer, that is, the value of the first constant m _A satisfies:

i=1,2,3,4..., or,

i=1, 2, 3, 4... For example, when i takes 1 and 0.5<m _A <1, the value of the first constant m _A may be 0.55, 0.58 or 0.6, etc.; At 1 o'clock, and 1 < m _A < 1.5, the value of the first constant m _A may be 1.4, 1.43 or 1.46.

By setting the value of the first constant m _A , the 0th order diffraction obtained by the incident light in the region corresponding to the grating layer 30 and the central region A of the field of view does not completely interfere with the constructive length, thereby The intensity of the light emitted by the non-field center area B of the display device 10 and directed into the eyes of the viewer Z and the light emitted by the area of the field center area A of the display device 10 directly into the eyes of the viewer Z The strength matches.

In the above embodiment, the display panel 20 includes a plurality of R pixels 24, a plurality of G pixels 25, and a plurality of B pixels 26, and the grating layer 30 includes: an R grating region 33 corresponding to the R pixel 24, corresponding to the G pixel 25. G grating region 34, and B grating region 35 corresponding to B pixel 26. When the thickness of the grating protrusion 31 in the region corresponding to the R-grating region 33 and the central region A of the field of view is set, the wavelength λ of the incident light incident on the grating layer 30 is red light. The wavelength of the red light is 630 nm; when the thickness of the grating protrusion 31 in the region of the G grating region 34 corresponding to the central region A of the field of view is set, the wavelength λ of the incident light incident on the grating layer 30 is green light. The wavelength of the green light is 550 nm; when the thickness of the grating protrusion 31 in the region corresponding to the B-grating region 35 and the central region A of the field of view is set, the wavelength λ of the incident light incident on the grating layer 30 is blue light. The wavelength, the wavelength of blue light is 430 nm.

In the above embodiment, there is a difference between n _GA and n _SA , and the sizes of n _GA and n _SA can be set according to actual applications. For example, the relationship between n _GA and n _SA can satisfy: n _GA <n _SA , or, n _GA >n _SA . In the embodiment of the present disclosure, the relationship between n _GA and n _SA satisfies: n _GA >n _SA , for example, n _GA = 1.5, n _SA =1, that is, formed in an area corresponding to the central area A of the field of view The material of the grating protrusion 31 has a refractive index of 1.5, and the refractive index of the filler in the gap 32 between the adjacent two grating protrusions 31 in the region corresponding to the central region A of the field of view is 1 when the grating When the layer 30 is located outside the display panel 20, the filler in the adjacent two grating projections 31 may be air in the region corresponding to the central region A of the field of view.

In the above embodiment, there is a difference between n _GB and n _SB , and the sizes of n _GB and n _SB can be set according to actual applications. For example, the relationship between n _GB and n _SB can satisfy: n _GB <n _SB , or, n _GB >n _SB . In the embodiment of the present disclosure, the relationship between n _GB and n _SB satisfies: n _GB >n _SB , for example, n _GB = 1.5, n _SB =1, that is, forms an area located corresponding to the non-field center area B The refractive index of the material of the inner grating protrusion 31 is 1.5, and the refractive index of the filler in the gap 32 between the adjacent two grating protrusions 31 in the region corresponding to the non-field of view central region B is 1 When the grating layer 30 is located outside the display panel 20, the filler in the adjacent two grating protrusions 31 in the region corresponding to the non-field center area B may be air.

In the formula (2), when the values of n _GB , n _{SB ,} and λ are determined, the larger the value of the second constant m _B is, the thickness of the grating protrusion 31 located in the region corresponding to the non-field of view central region B The larger the h _B is, the more expensive the process and time is usually required when the thicker bumps 31 are formed, resulting in a higher manufacturing cost of the display device 10 and a disadvantage of the thin design of the display device 10. Therefore, in order to reduce the manufacturing cost of the display device 10 and to facilitate the thin design of the display device 10, in the embodiment of the present disclosure, the second constant m _B satisfies: m _B = 0.5 to reduce the central region located in the non-field of view. The thickness h _B of the grating bump 31 in the region corresponding to _B reduces the manufacturing cost of the display device 10 and facilitates the thin design of the display device 10.

In the formula (3), when the values of n _GA , n _SA and λ are determined, the larger the value of the first constant m _A is, the thickness h of the grating protrusion 31 located in the region corresponding to the central region A of the field of view _The larger the _A , the more expensive the process and time is usually required due to the thicker grating bumps 31, resulting in a higher manufacturing cost of the display device 10 and a disadvantage of the thin design of the display device 10. Therefore, in order to reduce the manufacturing cost of the display device 10 and to facilitate the thin design of the display device 10, in the embodiment of the present disclosure, the first constant m _A satisfies: 0.5 < m _A < 1.5, and the first constant m _A preferably satisfies : 0.5 < m _A ≤ 1 to reduce the thickness h _A of the grating projections 31 in the region corresponding to the central region A of the field of view, thereby reducing the manufacturing cost of the display device 10 and facilitating the thin design of the display device 10. .

In the above embodiment, the display device 10 includes a plurality of R pixels 24, a plurality of G pixels 25, and a plurality of B pixels 26, and the grating layer 30 includes: an R grating region 33 corresponding to the R pixel 24, corresponding to the G pixel 25. G light A gate region 34, and a B grating region 35 corresponding to the B pixel 26.

When the thickness of the grating protrusion 31 in the region corresponding to the R grating region 33 and the non-field center region B is set, the wavelength λ of the incident light incident on the grating layer 30 is the wavelength of red light, and the wavelength of the red light is 630 nm. According to the formula (2), when the second constant m _B is 0.5, the thickness h _BR of the grating protrusion 31 in the region corresponding to the non-field center region B of the R grating region 33 is 630 nm; the setting is located in the G grating region. When the thickness of the grating protrusion 31 in the region corresponding to the non-field of view central region B is 34, the wavelength λ of the incident light incident on the grating layer 30 is the wavelength of the green light, and the wavelength of the green light is 550 nm, according to formula (2) When the second constant m _B is 0.5, the thickness h _BG of the grating protrusion 31 in the region corresponding to the G-grating region 34 and the non-field of view central region B is 630 nm; the setting is located in the B-grating region 35 and the non-field of view center. When the thickness of the grating protrusion 31 in the region corresponding to the region B, the wavelength λ of the incident light incident on the grating layer 30 is the wavelength of blue light, and the wavelength of the blue light is 430 nm. According to the formula (2), when the second constant m _B is At 0.5 o'clock, the thickness h _BB of the grating projections 31 in the region corresponding to the B grating region 33 and the non-field of view central region B is 430 nm.

When the thickness of the grating protrusion 31 in the region corresponding to the R-grating region 33 and the central region A of the field of view is set, the wavelength λ of the incident light incident on the grating layer 30 is the wavelength of red light, and the wavelength of the red light is 630 nm. According to the formula (3), when the first constant m _A satisfies: 0.5 < m _A < 1.5, the thickness h _AR of the grating protrusion 31 in the region of the R grating region 33 corresponding to the central region A of the field of view satisfies: 315 nm < h _AR <945nm. In practical applications, the intensity of the 0th order diffraction obtained after the incident light is diffracted in the region of the R grating region 33 corresponding to the central region A of the field of view and the region where the incident light corresponds to the non-field of view central region B in the R grating region 33. When the intensity difference of the first-order diffraction obtained after the diffraction occurs is small, the thickness h _AR of the grating protrusion 31 in the region corresponding to the central region A of the R grating region 33 may be 630 nm, or the R grating region 33 and the view a grating in the region corresponding to the field center area of the projection thickness h _AR 31 close to the value of 630nm, e.g., R grating region and the grating 33 in the area a corresponding to the center of the field region thickness h _AR 31 projections may be 550 nm, 580 nm, 600 nm, 650 nm or 680 nm, etc.; the intensity of the 0th order diffraction obtained after the incident light is diffracted in the region of the R grating region 33 corresponding to the central region A of the field of view corresponds to the incident light in the R grating region 33 corresponding to the non-viewing When the intensity of the first-order diffraction obtained after diffraction in the region of the field center region B is large, preferably, the thickness h _AR of the grating bump 31 in the region corresponding to the central region A of the R grating region 33 is close to 315 nm. For example, the R grating region 33 is within the region corresponding to the central region A of the field of view The gate thickness h _AR protrusion 31 may be of 330 nm, 400 nm or 370nm the like, or, R grating region 33 A field of view corresponding to the central region of the grating thickness in the region of the projections 31 h _AR nearly 945 nm, for example, the central field of view The thickness h _AR of the grating protrusion 31 of the R grating region 33 in the region may be 850 nm, 900 nm or 930 nm or the like.

When the thickness of the grating protrusion 31 in the region corresponding to the G-grating region 34 and the central region A of the field of view is set, the wavelength λ of the incident light incident on the grating layer 30 is the wavelength of the green light, and the wavelength of the green light is 550 nm. According to the formula (3), when the first constant m _A satisfies: 0.5 < m _A < 1.5, the thickness h _AG of the grating protrusion 31 in the region of the G grating region 34 corresponding to the central region A of the field of view satisfies: 275 nm < h _AG <825nm. In practical applications, the intensity of the 0th order diffraction obtained after the incident light is diffracted in the region of the G grating region 34 corresponding to the central region A of the field of view and the region where the incident light corresponds to the non-field of view central region B in the G grating region 34. When the intensity difference of the first-order diffraction obtained after the diffraction occurs is small, the thickness h _AG of the grating protrusion 31 in the region corresponding to the central region A of the G-grating region 34 may be 550 nm, or the G-grating region 34 and the view a grating in the region corresponding to the field center area of the projection thickness h _AG 31 values approaching 550 nm, e.g., in the area a grating G corresponding to the grating region 34 and the projection center of the field region thickness h _AG 31 may be 500 nm, 530 nm, 580 nm or 600 nm, etc.; the intensity of the 0th order diffraction obtained after the incident light is diffracted in the region of the G grating region 34 corresponding to the central region A of the field of view and the incident light in the G grating region 34 correspond to the center of the non-field of view When the intensity of the first-order diffraction obtained after diffraction in the region of the region B is largely different, preferably, the thickness h _AG of the grating projection 31 in the region corresponding to the central region A of the G-grating region 34 is close to 275 nm, for example, a grating in the region of the G grating region 34 corresponding to the central region A of the field of view The thickness h _{AG of the} protrusion 31 may be 300 nm, 320 nm or 350 nm or the like, or the thickness h _AG of the grating protrusion 31 in the region of the G grating region 34 corresponding to the central region A of the field of view is close to 825 nm, for example, the G grating region 34 The thickness h _AG of the grating protrusion 31 in the region corresponding to the central region A of the field of view may be 800 nm, 760 nm or 730 nm or the like.

When the thickness of the grating protrusion 31 in the region corresponding to the B-grating region 35 and the central region A of the field of view is set, the wavelength λ of the incident light incident on the grating layer 30 is the wavelength of blue light, and the wavelength of the blue light is 430 nm, according to the formula (3) When the first constant m _A satisfies: 0.5 < m _A < 1.5, the thickness h _AB of the grating protrusion 31 in the region of the B grating region 35 corresponding to the central region A of the field of view satisfies: 215 nm < h _AB < 645nm. In practical applications, the intensity of the 0th order diffraction obtained after the incident light is diffracted in the region of the B grating region 35 corresponding to the central region A of the field of view and the region where the incident light corresponds to the non-field of view central region B in the B grating region 35. When the intensity of the first-order diffraction obtained after the diffraction occurs is small, the thickness h _AB of the grating protrusion 31 in the region corresponding to the central region A of the B-grating region 35 may be 430 nm, or the B-grating region 35 and the view a region of the grating in the center field corresponding to the projection of the thickness h _AB 31 values approaching 430nm, e.g., B grating region and the grating 35 in the area a corresponding to the thickness of the projection center of the field region may be h _AB 31 350 nm, 380 nm, 480 nm, or 500 nm, etc.; the intensity of the 0th order diffraction obtained by the incident light in the region where the B grating region 35 corresponds to the central region A of the field of view and the incident light in the B grating region 35 correspond to the non-field of view center. When the intensity of the first-order diffraction obtained after diffraction in the region of the region B differs greatly, preferably, the thickness h _AB of the grating projection 31 in the region corresponding to the central region A of the B grating region 35 is close to 215 nm, for example, a grating in the region of the B-grating region 35 corresponding to the central region A of the field of view _AB 31 from the thickness h may be 250 nm, 300 nm or 280nm the like, or the thickness of the grating region 31 B and the grating 35 in the area A corresponding to the center of the field region near the protrusion h 645nm _AB, e.g., 35 and the grating region B The thickness h _AB of the grating protrusion 31 in the region corresponding to the central area A of the field of view may be 620 nm, 600 nm or 550 nm or the like.

In practical applications, referring to FIG. 18 and FIG. 19, when the grating period of the grating layer 30 is 3 μm and the thickness of the grating protrusion 31 of the grating layer 30 is 500 nm, incident light incident on the grating layer 30 occurs in the grating layer 30. The relationship between the light-emitting efficiency of the 0th-order diffraction obtained after diffraction and the grating duty ratio is as shown in FIG. 18. The light-emitting efficiency of the first-order diffraction obtained by the incident light incident on the grating layer 30 after being diffracted by the grating layer 30 is different from that of the grating. The relationship between the air ratios is as shown in Fig. 19. As can be seen from Fig. 18, for the 0th order diffraction, when the grating duty ratio is 0.5, the intensity of the 0th order diffraction is the smallest, and when the grating duty ratio is less than 0.5, the 0 level The intensity of the diffraction decreases as the duty ratio of the grating increases. When the grating duty ratio is greater than 0.5, the intensity of the 0-order diffraction increases as the duty ratio of the grating increases. As shown in Fig. 19, for the level 1 In terms of diffraction, when the grating duty ratio is 0.5, the intensity of the first-order diffraction is the largest, and the grating accounts for When the space ratio is less than 0.5, the intensity of the first-order diffraction increases as the duty ratio of the grating increases. When the grating duty ratio is greater than 0.5, the intensity of the first-order diffraction decreases as the duty ratio of the grating increases.

That is, the intensity of the light emitted by each position of the display device 10 is also related to the grating duty ratio of the grating layer 30, and according to the above conclusion, the grating duty ratio of the grating layer 30 can be set by Increasing the intensity of the non-zero-order diffraction obtained after the incident light is diffracted in the region corresponding to the grating layer 30 and the non-field of view central region B, thereby increasing the non-view center region B of the display device 10 and directing it to the viewer Z. The intensity of the light in the eye, and if necessary, appropriately reduces the intensity of the 0th-order diffraction obtained by the incident light diffracted in the region corresponding to the grating layer 30 and the central region A of the field of view, thereby appropriately reducing the field of view of the display device 10. The intensity of the light emitted by the central area A directly into the eye of the viewer Z, thereby further intensifying the intensity of light emitted by the non-field center area B of the display device 10 into the eye of the viewer Z and by the display device The field center area A of 10 is emitted and directly matched to the intensity of light in the eyes of the viewer Z.

Specifically, the, field of view corresponding to the central region A region, the grating layer _A satisfies the grating duty cycle DC of 30: 0.2≤dc _A ≤0.8; field of view within the non-central area corresponding to the area B, the grating of the grating layer 30 The duty ratio dc _B is 0.5. In a specific implementation, the grating duty ratio of the R grating region 33, the grating duty ratio of the G grating region 34, and the grating duty ratio of the B grating region 35 are all in the range of 0 to 1 in the region corresponding to the central region A of the field of view. In the region corresponding to the non-field center region B, the grating duty ratio of the R grating region 33, the grating duty ratio of the G grating region 34, and the grating duty ratio of the B grating region 35 are both 0.5.

In the embodiment of the present disclosure, the grating duty ratio dc _{B of the} grating layer 30 is set to 0.5 in the region corresponding to the grating layer 30 and the non-field of view central region B, and thus is within the region corresponding to the non-field of view central region B. When the grating period of the grating layer 30 and the thickness of the grating protrusion 31 of the grating layer 30 are constant, the intensity of the first order diffraction obtained after the incident light is diffracted in the region corresponding to the grating layer 30 and the non-field of view central region B is the largest. The light emitted by the non-field center area B of the display device 10 and directed into the eyes of the viewer Z has a high intensity, so that the non-field center area B of the display device 10 can be emitted directly to the viewer. The intensity of the light in the eye of Z matches the intensity of the light emitted by the field center area A of the display device 10 and directed into the eye of the viewer Z.

Embodiments disclosed in the present embodiment, the region of the center of the field corresponding to the region A, the duty cycle of the grating 30, the grating layer satisfies _A DC: 0.2≤dc _A ≤0.8, in practice, the field of view corresponding to the central region A In the region, the value of the grating duty ratio dc _A of the grating layer 30 can be set according to actual needs, for example, emitted by the non-field center area B of the display device 10 and directed to the light in the eyes of the viewer Z. When the intensity is different from the intensity of the light emitted from the field center area A of the display device 10 and directed to the viewer Z, the grating of the grating layer 30 may be made in the area corresponding to the central area A of the field of view. The duty ratio dc _A is 0.5, and in this case, in the region corresponding to the central region A of the field of view, when the grating period of the grating layer 30 and the thickness of the grating protrusion 31 of the grating layer 30 are constant, the incident light is in the grating layer. The intensity of the 0th-order diffraction obtained after diffraction in the region corresponding to the central region A of the field of view is the smallest, and thus the level 0 of the incident light obtained after diffraction in the region corresponding to the grating layer 30 and the central region A of the field of view can be appropriately reduced. The intensity of the diffraction, so that the non-view by the display device 10 can be made B issues central area, the intensity of direct light in the direction Z of the viewer's eyes and the center of the field emitted by the display region A of the apparatus 10, to match the intensity of direct light in the Z viewer's eyes.

The intensity of light emitted by the non-field center area B of the display device 10, directed into the eye of the viewer Z, and the intensity of light emitted by the field center area A of the display device 10 and directed into the eye of the viewer Z When the phase difference is small, the grating duty ratio dc _{A of the} grating layer 30 in the region corresponding to the central region A of the field of view may satisfy: 0.2 ≤ dc _A < 0.5, or 0.5 < dc _A ≤ 0.8, for example, a grating layer The grating duty ratio dc _A of 30 may be 0.2, 0.3, 0.4, 0.6, 0.7 or 0.8. In this case, the grating period of the grating layer 30 and the grating layer 30 are in the region corresponding to the central region A of the field of view. When the thickness of the grating protrusion 31 is constant, the intensity of the 0th order diffraction obtained after the incident light is diffracted in the region corresponding to the grating layer 30 and the central portion A of the field of view is not minimized, and the incident light is at the center of the grating layer 30 and the field of view. The intensity of the 0th-order diffraction obtained after diffraction in the region corresponding to the region A is not at the maximum, and thus the intensity of light emitted from the non-field center region B of the display device 10 and directed to the viewer Z can be made. The eye is emitted from the field center area A of the display device 10 and directed to the viewer Z The intensity of light matches.

In the above embodiment, the grating protrusions 31 may be transparent grating protrusions or non-transparent grating protrusions, and the material of the grating protrusions 31 may have various options. In the embodiment of the present disclosure, the grating protrusion 31 is a transparent grating protrusion, and the grating protrusion 31 is a polymethyl methacrylate grating protrusion.

Referring to FIGS. 20 to 25, the cross-sectional shape of the grating projection 31 is stepped, trapezoidal or triangular.

For example, referring to FIG. 20 and FIG. 21, the grating layer 30 includes a plurality of grating protrusions 31 with slits 32 between adjacent two grating protrusions 31, and the grating protrusions 31 are perpendicular to the adjacent two grating protrusions. After the plane cut in the extending direction of the slit 32 between 31, the cross-sectional shape of the obtained grating projection 31 is stepped. In practical applications, as shown in FIG. 21, one side of the section of the grating protrusion 31 may be stepped, or, as shown in FIG. 20, the both sides of the section of the grating protrusion 31 may be steps. Shape, and when both sides of the section of the grating protrusion 31 are stepped, the stepped shape on both sides of the section of the grating protrusion 31 may be perpendicular to the light incident surface of the grating protrusion 31 in the section of the grating protrusion 31 The center line is symmetrical, and the stepped shape on both sides of the section of the grating protrusion 31 may be asymmetrical with respect to the center line of the grating entrance 31 which is perpendicular to the entrance surface of the grating protrusion 31.

Referring to FIG. 22 and FIG. 23, the grating layer 30 includes a plurality of grating protrusions 31. The adjacent two grating protrusions 31 have a slit 32 therebetween, and the grating protrusions 31 are perpendicular to the adjacent two grating protrusions 31. After the plane between the extending direction of the slit 32 is cut off, the obtained grating projection 31 has a triangular cross section shape. In practical applications, as shown in FIG. 22, both sides of the cross section of the grating protrusion 31 may be symmetrical with respect to the center line of the light incident surface of the grating protrusion 31 on the cross section of the grating protrusion 31. At this time, the grating protrusion 31 The cross-sectional shape is an isosceles triangle, or, as shown in FIG. 23, both sides of the cross section of the grating projection 31 may be asymmetrical with respect to the center line of the grating projection 31 perpendicular to the entrance surface of the grating projection 31.

Referring to FIG. 24 and FIG. 25, the grating layer 30 includes a plurality of grating protrusions 31. The adjacent two grating protrusions 31 have a slit 32 therebetween, and the grating protrusions 31 are perpendicular to the adjacent two grating protrusions 31. After the plane between the extending direction of the slit 32 is cut off, the obtained grating projection 31 has a trapezoidal shape. In practical applications, as shown in FIG. 24, both sides of the section of the grating protrusion 31 may be perpendicular to the grating protrusion on the section of the grating protrusion 31. The center line of the light incident surface of 31 is symmetrical. At this time, the cross-sectional shape of the grating projection 31 is an isosceles trapezoid, or, as shown in Fig. 25, both sides of the cross section of the grating projection 31 may be opposed to the cross section of the grating projection 31. The center line of the light incident surface perpendicular to the grating protrusion 31 is asymmetrical.

Since the cross-sectional shape of the grating protrusion 31 is stepped, trapezoidal or triangular, the light-emitting surface of each grating protrusion 31 is not parallel to the light-incident surface of the grating protrusion 31, and the incident light incident on the grating layer 30 passes through the grating. At the time of layer 30, incident light is multi-diffracted and multi-interference in the grating layer 30, which increases the effect of diffraction and interference of incident light on the grating layer 30, and enhances the ability to adjust the light-emitting direction at each position of the display device 10, so that The light emitted at each position of the display device 10 is deflected toward the line of sight of the viewer Z, and the position along the position of the viewer Z, the position on the virtual screen 40, the position corresponding to the position on the display device 10 and the virtual screen 40 is located. Deflection, while increasing the amount and intensity of light emitted by the various positions of the display device 10 and directed into the eyes of the viewer Z to better control the propagation of light within the display device 10, improving the display The propagation of light within the device 10 effects a controlled control effect, thereby improving the viewing experience of the viewer Z, giving the viewer Z a more realistic and comfortable viewing experience.

It is worth mentioning that when the two sides of the section of the grating protrusion 31 are asymmetrical with respect to the center line of the section of the grating protrusion 31, when the incident light incident on the grating layer 30 passes through the grating layer 30, the incident light is in the grating layer 30. Diffraction and interference occur, and the diffraction angle and intensity of the obtained k-th order diffraction are asymmetrical with respect to the 0th order diffraction, and the sides of the cross section of the grating protrusion 31 are asymmetrical with respect to the center line of the cross section of the grating protrusion 31, so that the viewer is facing away from the viewer. The k-order diffraction interference emitted by the line of sight is cancelled, and the k-order diffraction interference which is emitted toward the viewer's line of sight is long, further improving the control effect of controlling the propagation of light in the display device 10, thereby improving the viewer Z's viewing. Experience brings a more realistic and comfortable viewing experience to viewer Z.

Referring to FIG. 3 , the display panel 20 includes a color film layer 23 , and the grating layer 30 is located on the light exiting side of the color film layer 23 or the light incident side of the color film layer 23 . For example, as shown in FIG. 3, the display panel 20 includes a first substrate 21, a second substrate 22, and a color film layer 23. The first substrate 21 and the second substrate 22 are disposed opposite to each other, and the color film layer 23 is located on the first substrate 21 and Between the two substrates 22; the downward direction in FIG. 3 is the light-emitting direction of the display panel 20, and the upper side of the color film layer 23 in FIG. 3 is the light-incident side of the color film layer 23, and the color film layer 23 in FIG. The side is the light exiting side of the color film layer 23; the grating layer 30 may be located on the light emitting side of the color film layer 23, for example, the grating layer 30 may be located between the color film layer 23 and the second substrate 22, or the grating layer 30 may be located at the The two substrates 22 are disposed on the side of the color film layer 23; or the grating layer 30 may be located on the light incident side of the color film layer 23. For example, the grating layer 30 may be located between the color film layer 23 and the first substrate 22, or The grating layer 30 may be located on the side of the first substrate 21 facing away from the color film layer 23.

Referring to FIG. 3 , in the embodiment of the present disclosure, the grating layer 30 is located on the light exiting side of the color film layer 23 , and the grating layer 30 is in contact with the color film layer 23 . Specifically, as shown in FIG. 3, the display panel 20 includes a first substrate 21, a second substrate 22, and a color film layer 23. The first substrate 21 and the second substrate 22 are disposed opposite to each other, and the color film layer 23 is located on the first substrate 21 and Between the second substrates 22; the grating layer 30 is located between the color film layer 23 and the second substrate 22, and the grating layer 30 is in contact with the color film layer 23. In this way, the incident light incident on the grating layer 30 is the outgoing light of the color filter layer 23, and since the grating layer 30 is in contact with the color filter layer 23, the emitted light of the color filter layer 23 is not incident on the grating layer 30. Since the light is mixed, it is possible to prevent the control effect of the grating layer 30 from propagating the light in the display device 10 due to the light mixing of the light emitted from the color filter layer 23.

In the above embodiment, the grating layer 30 may be disposed outside the display panel 20. For example, the display device 10 is a liquid crystal display device. The display device 10 includes a backlight and a display panel 20 on the light emitting side of the backlight. The backlight is a display panel. 20 provides a surface light source; the grating layer 30 may be disposed on the light exiting side of the backlight, and the grating layer 30 is in contact with the backlight, and the surface light source provided by the backlight is incident on the display panel 20 through the grating layer 30.

When the display device 10 provided in the above embodiment is prepared, the grating layer 30 can be prepared in various ways. For example, the grating layer 30 can be prepared by a nanoimprint process or a laser interference process.

In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above is only the specific embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the disclosure. It should be covered within the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be determined by the scope of the claims.

Claims

A display device, comprising: a display panel, and a grating layer disposed inside the display panel or outside the display panel, wherein the display panel includes a plurality of R pixels, a plurality of G pixels, and a plurality a B pixel, the grating layer comprising: an R grating region corresponding to the R pixel, a G grating region corresponding to the G pixel, and a B grating region corresponding to the B pixel;

a direction along a center of a field of view of the display device pointing toward a non-field center region of the display device, a grating period of the R grating region, a grating period of the G grating region, and a B grating region The grating period is gradually reduced, the display device corresponds to the light emitted by the position of the R pixel, the light emitted by the display device corresponding to the position of the G pixel, and the display device corresponding to the B pixel The light emitted from the position is respectively emitted along a straight line formed by the position of the R pixel and a line formed by the viewer, a position of the G pixel and a straight line formed by the viewer, and a position of the B pixel and a line formed by the viewer.
The display device according to claim 1, wherein a center of the field center area corresponds to a center of the display device, and a direction from the center of the display device to the display device in a lateral direction of the display device On both sides, the grating period of the R grating region, the grating period of the G grating region, and the grating period of the B grating region are gradually reduced.
The display device according to claim 1, wherein a center of the field center area corresponds to a center of the display device, and a direction from a center of the display device to the display device in a longitudinal direction of the display device On both sides, the grating period of the R grating region, the grating period of the G grating region, and the grating period of the B grating region are gradually reduced.
The display device according to claim 1, wherein a center of the field center area corresponds to a center of the display device, and a center of the display device is directed to the display device along a longitudinal direction of the display device On both sides, the grating period of the R grating region, the grating period of the G grating region, and the grating period of the B grating region are gradually decreased; along the lateral direction of the display device, by the display device Centering toward both sides of the display device, the grating period of the R grating region, the grating period of the G grating region, and the grating period of the B grating region are gradually reduced.
The display device according to claim 1, wherein, in a lateral direction of the display device, the display device comprises a plurality of R pixel columns, a plurality of G pixel columns, and a plurality of B pixel columns, the R pixel columns, The G pixel column and the B pixel column are arranged in phase, the R pixel column being formed by a plurality of the R pixels arranged in a longitudinal direction of the display device, the G pixel columns being arranged in a longitudinal direction of the display device A plurality of the G pixels are formed, and the B pixel columns are formed by a plurality of the B pixels arranged in a longitudinal direction of the display device.
The display device according to claim 1, wherein, in a longitudinal direction of the display device, the display device includes a plurality of R pixel rows, a plurality of G pixel rows, and a plurality of B pixel rows, the R pixel row, The G pixel row and the B pixel row are arranged in phase, the R pixel row being formed by a plurality of the R pixels arranged in a lateral direction of the display device, the G pixel rows being arranged in a lateral direction along the display device A plurality of the G pixels are formed, and the B pixel rows are formed by a plurality of the B pixels arranged in a lateral direction of the display device.
The display device according to claim 1, wherein the R pixel, the G pixel, and the B pixel are arranged in phase along a lateral direction of the display device; and/or in a longitudinal direction of the display device, R pixel, the G pixel Arranged with the B pixels.
The display device according to any one of claims 1 to 7, wherein said grating layer comprises a plurality of grating projections, said grating projections being strip-shaped grating projections, said grating projections being along said display In the longitudinal extension of the device, a plurality of said grating projections are arranged in parallel along the transverse direction of said display device.
The display device according to any one of claims 1 to 7, wherein said grating layer comprises a plurality of grating projections, said grating projections being strip-shaped grating projections, said grating projections being along said display In the lateral extension of the device, a plurality of said grating projections are arranged in parallel along the longitudinal direction of said display device.
The display device according to any one of claims 1 to 9, wherein said viewer views a screen displayed by said display device, said screen being projected on a virtual screen behind said display device, said virtual screen A curved virtual screen having a center of the circle, the viewer being located at the center of the virtual screen.
The display device according to any one of claims 1 to 9, wherein said viewer views a screen displayed by said display device, said screen being projected on a virtual screen behind said display device, said virtual screen A curved virtual screen having a center of the circle, the viewer being located on a side of the center of the virtual screen near the virtual screen.
The display device according to any one of claims 1 to 9, wherein said viewer views a screen displayed by said display device, said screen being projected on a virtual screen behind said display device, said virtual screen A curved virtual screen having a center of the circle, the display device being located on a side of the center of the virtual screen away from the virtual screen.
The display device according to any one of claims 1 to 12, wherein said grating layer comprises a plurality of grating projections, wherein a thickness of said grating projections is located in a region corresponding to said central region of said field of view h A meets:

Wherein n GA is a refractive index of the grating protrusion located in a region corresponding to the central region of the field of view, and n SA is located in a region corresponding to the central region of the field of view, adjacent to the two a refractive index of the filler in the gap between the grating bumps, λ is the wavelength of incident light incident on the grating layer, m A is a first constant, and the first constant m A satisfies:

The thickness h B of the grating protrusions located in a region corresponding to the non-field of view central region satisfies:

Where n GB is the refractive index of the grating protrusion located in a region corresponding to the non-view center area, and n SB is located in an area corresponding to the non-view center area, adjacent two a refractive index of a filler in a gap between the grating protrusions, λ is a wavelength of incident light incident to the grating layer, m B is a second constant, and the second constant m B satisfies:
The display device according to claim 13, wherein n GA >n SA ; n GB >n SB .
The display device according to claim 14, wherein n GA = n GB = 1.5, n SA = n SB =1.
The display device according to claim 13, wherein 0.5 < m A <1.5; m B = 0.5.
The display device according to claim 13, wherein a thickness h AR of the grating protrusion of the R grating region satisfies: 315 nm < h AR < 945 nm in a region corresponding to the central region of the field of view, the G grating The thickness h AG of the grating protrusion of the region satisfies: 275 nm < h AG <825 nm, and the thickness h AB of the grating protrusion of the B grating region satisfies: 215 nm < h AB <645 nm;

In a region corresponding to the non-field center region, a thickness h BR of the grating protrusion in the R grating region is 630 nm, and a thickness h BG of the grating protrusion of the G grating region is 550 nm, the B grating The thickness of the grating protrusions h BB is 430 nm.
The display device according to any one of claims 1 to 17, wherein the inner region and the field of view corresponding to the central region, the duty ratio of the gratings dc A layer satisfy: 0.2≤dc A ≤0.8;

In the region corresponding to the non-field of view central region, the grating layer has a grating duty ratio dc B of 0.5.
The display device according to any one of claims 1 to 17, wherein an incident angle of incident light incident on the grating layer is 0°.
The display device according to any one of claims 1 to 19, wherein the grating projection of the grating layer is a transparent grating projection.
The display device according to claim 20, wherein the grating protrusion of the grating layer is a polymethyl methacrylate grating protrusion.
The display device according to any one of claims 1 to 21, wherein a cross-sectional shape of the grating protrusion of the grating layer is stepped, trapezoidal or triangular.
The display device according to any one of claims 1 to 22, wherein the display panel comprises a color film layer, the grating layer is located on a light exiting side of the color film layer, and the grating layer and the color film Layer contact.
The display device according to any one of claims 1 to 23, wherein the display device further comprises a backlight, the backlight is located on a light incident side of the display panel; and the grating layer is located at the backlight a light exiting side, and the grating layer is in contact with the backlight.
The display device according to any one of claims 1 to 24, wherein the grating layer is prepared by a nanoimprint process or a laser interference process.